Falling object preventing structure of petroleum drilling wellhead

Abstract

The utility model belongs to the technical field of petroleum exploitation, and particularly relates to a petroleum drilling wellhead falling object prevention structure which comprises a loading assembly enabling the structure to be easily disassembled and assembled, and a positioning assembly capable of stably installing the structure on petroleum drilling wellheads of different specifications is arranged on the loading assembly. The positioning assembly is provided with a blocking assembly which can effectively block a well mouth and can properly leak out of the well mouth according to well drilling requirements. Dual protection is provided for the well mouth through the cover plate and the protection piece, so that falling objects are effectively prevented from falling into a well, and meanwhile the falling objects falling to the structure can naturally slide down; the distance between the cover plates and the protective parts in the two blocking assemblies can be conveniently adjusted through the adjusting parts, so that the shielded range of a well mouth is adjusted, and the structure can meet different well drilling requirements under the condition that the structure is not disassembled; by means of the detachable loading assembly, the structure can be assembled and disassembled at a well mouth under the condition that drilling work is not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil exploitation, and in particular relates to a structure for preventing falling objects from an oil drilling wellhead. Background Art

[0002] Oil drilling is widely used in national economic construction. However, the wellhead is the place where falling objects are most likely to occur. Once bolts, crowbars, drill bits and other objects fall into the well, it is very easy for the drill to get stuck and the downhole instruments and equipment to be damaged during the subsequent drilling process.

[0003] A Chinese patent document with authorization announcement number CN216477237U discloses a wellhead anti-falling object device, which places a sealing cover above the wellhead through a height adjustment component, and drives the sealing cover downward by the height adjustment component to completely block the wellhead to prevent falling objects from entering the wellhead. In addition, an elastic sealing gasket is arranged on one side of the sealing cover to block the wellhead, which further improves the sealing performance of the wellhead, thereby improving the protection performance of the wellhead.

[0004] However, in the prior art, the wellhead anti-falling device will block the wellhead. When drilling operations are required, the device needs to be removed in advance. During the removal process, there is also a risk of debris falling into the well. For this reason, an oil drilling wellhead anti-falling structure is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a structure for preventing falling objects at the wellhead of an oil drilling well.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A structure for preventing falling objects from a wellhead of an oil drilling well, comprising a loading assembly that allows the structure to be easily disassembled and assembled, a positioning assembly that can stably install the structure at wellheads of oil drilling wells of different specifications, and a blocking assembly that can effectively block the wellhead and appropriately leak out of the wellhead according to drilling needs.

[0008] The loading assembly includes a ring stand;

[0009] The blocking assembly comprises a cover plate movably connected to the ring frame, a protective member that allows fallen objects to slide naturally off the structure, and an adjusting member that can synchronously adjust the wellhead range blocked by the cover plate and the protective member.

[0010] Preferably, the adjusting member comprises a rotating rod movably connected to the cover plate, the rotating rod is fixedly connected to the second screw rod, the upper end of the second screw rod is fixedly connected to the second rotating handle, and the lower end of the second screw rod is movably connected to a joint.

[0011] Preferably, the protective member includes a ring strip fixedly connected to the upper side of the cover plate. A vertical rod is fixedly connected above the cover plate, and a ring piece is fixedly connected to the upper end of the vertical rod. A retaining net is arranged between the ring strip and the ring piece.

[0012] Preferably, the ring frame is rotatably connected to the cover plate.

[0013] Preferably, the ring frame is rotatably connected to the joint, and the cover plate is rotatably connected to the rotating rod.

[0014] Preferably, the rotating rod is threadedly connected to the second screw rod, and the second screw rod is rotatably connected to the joint.

[0015] The beneficial effects of the present utility model are as follows: It is convenient to provide double protection for the wellhead through the cover plate and the protective member, so as to effectively prevent objects from falling into the well, and at the same time, the objects falling onto this structure can slide naturally; it is convenient to adjust the distance between the cover plates and the protective members in the two sets of sealing and blocking components through the adjusting member, thereby adjusting the range of the wellhead blocked, so that this structure can adapt to different drilling requirements without disassembly; it is convenient to load and unload at the wellhead through the detachable loading component without affecting the drilling work. Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0017] Figure 1 is an isometric structural schematic diagram of a structure for preventing objects from falling at an oil drilling wellhead according to the present utility model;

[0018] Figure 2 is a right-view structural schematic diagram of a structure for preventing objects from falling at an oil drilling wellhead according to the present utility model;

[0019] Figure 3 is Figure 1 a partial component structural schematic diagram of

[0020] Figure 4 is Figure 1 a partial component structural schematic diagram of

[0021] Figure 5 is a structural schematic diagram of the cover plate of a structure for preventing objects from falling at an oil drilling wellhead according to the present utility model.

[0022] The descriptions of the reference numerals are as follows:

[0023] 1. Loading component; 101. Ring frame; 102. Grip; 103. Anti-loosening nut; 2. Positioning component; 201. First screw; 202. First turning handle; 203. Support; 204. Bracket; 205. Friction plate; 3. Blocking component; 301. Cover plate; 302. Rotating rod; 303. Second screw; 304. Second turning handle; 305. Connector; 306. Ring strip; 307. Vertical rod; 308. Ring piece; 309. Mesh barrier. Detailed implementation mode

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0026] The present invention will be further described below through embodiments in conjunction with the drawings.

[0027] As Figures 1 - 5 shown, an anti-falling object structure for an oil drilling wellhead includes a loading component 1 that makes the structure easy to disassemble and assemble. A positioning component 2 is provided on the loading component 1, which can stably install the structure on oil drilling wellheads of different specifications. A blocking component 3 is provided on the positioning component 2, which can effectively block the wellhead and can appropriately expose the wellhead according to the needs of drilling.

[0028] In this embodiment: The loading component 1 includes a ring frame 101. A grip 102 is movably connected between the ring frames 101. Anti-loosening nuts 103 are fixedly connected to the front and rear ends of the grip 102.

[0029] The ring frame 101 is slidably connected to the grip 102, and the grip 102 is threadedly connected to the anti-loosening nut 103; the cover plate 301 and some components of the positioning assembly 2 are installed through the ring frame 101, the two ring frames 101 are connected through the grip 102, which makes it easy for the staff to move this structure, and the anti-loosening nut 103 is used to prevent the ring frame 101 and the grip 102 from accidentally separating.

[0030] In this embodiment: The positioning assembly 2 includes a first screw rod 201 fixedly connected to the ring frame 101. One end of the first screw rod 201 is fixedly connected to a first rotating handle 202, and the other end of the first screw rod 201 is movably connected to a support 203. A bracket 204 is fixedly connected to the support 203, and a friction plate 205 is fixedly connected to one side of the bracket 204;

[0031] The ring frame 101 is threadedly connected to the first screw rod 201, and the first screw rod 201 is rotatably connected to the support 203; the first screw rod 201 is conveniently rotated through the first rotating handle 202, the horizontal position of the support 203 in this structure is adjusted by the first screw rod 201 after rotating relative to the ring frame 101, the bracket 204 and the friction plate 205 can move without rotating with the first screw rod 201 through the support 203, and the outer side of the wellhead is contacted through the friction plate 205 to ensure sufficient friction between this structure and the outer side of the wellhead, so as to avoid the slipping phenomenon after this structure is installed.

[0032] In this embodiment: The blocking assembly 3 includes a cover plate 301 movably connected to the ring frame 101, and a protective member that allows the falling object to naturally slide off this structure, and an adjusting member that can synchronously adjust the wellhead range blocked by the cover plate 301 and the protective member. The adjusting member includes a rotating rod 302 movably connected to the cover plate 301. A second screw rod 303 is fixedly connected to the rotating rod 302. A second rotating handle 304 is fixedly connected to the upper end of the second screw rod 303, and a joint 305 is movably connected to the lower end of the second screw rod 303. The protective member includes a ring strip 306 fixedly connected to the upper side of the cover plate 301. A vertical rod 307 is fixedly connected above the cover plate 301, and a ring piece 308 is fixedly connected to the upper end of the vertical rod 307. A retaining net 309 is arranged between the ring strip 306 and the ring piece 308;

[0033] The ring frame 101 is rotatably connected to the cover plate 301, the ring frame 101 is rotatably connected to the joint 305, the cover plate 301 is rotatably connected to the rotating rod 302, the rotating rod 302 is threadedly connected to the second screw rod 303, and the second screw rod 303 is rotatably connected to the joint 305;

[0034] Cover the wellhead with the cover plate 301, limit the movable range of one end of the second screw rod 303 connected thereto in this structure through the joint 305, conveniently rotate the second screw rod 303 through the second rotating handle 304, and adjust the distance between the rotating rod 302 and the joint 305 through the rotated second screw rod 303, so as to realize the rotation of the cover plate 301 relative to the ring frame 101. Install the ring piece 308 at a certain height above the cover plate 301 through the vertical rod 307, so that there is a certain height difference between the ring strip 306 and the ring piece 308, so that the retaining net 309 installed between the ring strip 306 and the ring piece 308 has a certain slope, so that the falling objects can slide down naturally.

[0035] Working principle: When this structure is installed and used for preventing falling objects at the oil drilling wellhead, the handle 102 can be held to sleeved this structure on the outer side of the wellhead, and make the cover plate 301 in the closed state contact the upper edge of the wellhead. Then, this structure is appropriately translated so that this structure can be located at the center position above the wellhead. After the movement is completed, the first rotating handle 202 can be rotated to make each friction plate 205 tightly abut against the outer wall of the wellhead, so as to complete the installation of this structure and prevent this structure from sliding down when the cover plate 301 does not contact the wellhead. Then, the cover plate 301 and the retaining net 309 can provide double protection for the wellhead to prevent objects from falling into the well.

[0036] When drilling work is not carried out, the circular opening between the upper ends of the two retaining nets 309 can also be blocked by the circular cover with a binding rope to completely seal the wellhead. When drilling work is carried out, the second rotating handle 304 can be rotated to make the rotating rod 302 drive the cover plate 301 to rotate relative to the ring frame 101, so that there is a certain distance between the two cover plates 301, so as to appropriately expose the wellhead.

[0037] If it is necessary to disassemble and assemble this structure during the drilling process, only by connecting or separating the two ring frames 101 through the disassembly and assembly handle 102, the disassembly and assembly of this structure can be quickly completed without affecting the drilling work.

[0038] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Within the knowledge scope of those skilled in the art to which the present invention pertains, various changes can also be made without departing from the purpose of the present invention.

Claims

1. A structure for preventing falling objects at the wellhead of a petroleum drilling well, characterized in that: The invention comprises a loading assembly (1) which enables the structure to be easily assembled and disassembled, the loading assembly (1) being provided with a positioning assembly (2) which enables the structure to be stably installed on oil drilling wellheads of different specifications, the positioning assembly (2) being provided with a blocking assembly (3) which can effectively block the wellhead and can appropriately leak out of the wellhead according to drilling needs; The loading assembly (1) comprises a ring frame (101); The blocking assembly (3) comprises a cover plate (301) movably connected to the ring frame (101), a protective member that allows a falling object to naturally slide off the structure, and an adjusting member that can synchronously adjust the wellhead range blocked by the cover plate (301) and the protective member.

2. The oil drilling wellhead anti-falling object structure according to claim 1, characterized in that: The adjusting member comprises a rotating rod (302) movably connected to the cover plate (301), a second screw rod (303) being fixedly connected to the rotating rod (302), a second rotating handle (304) being fixedly connected to the upper end of the second screw rod (303), and a joint (305) being movably connected to the lower end of the second screw rod (303).

3. The oil drilling wellhead anti-falling object structure according to claim 2, characterized in that: The protective member comprises a ring strip (306) fixedly connected to the upper side of the cover plate (301); a vertical pole (307) is fixedly connected above the cover plate (301); a ring piece (308) is fixedly connected to the upper end of the vertical pole (307); and a blocking net (309) is provided between the ring strip (306) and the ring piece (308).

4. The oil drilling wellhead anti-falling object structure according to claim 2, characterized in that: The ring frame (101) is rotatably connected to the cover plate (301).

5. The oil drilling wellhead anti-falling object structure according to claim 4, characterized in that: The ring frame (101) is rotatably connected to the joint (305), and the cover plate (301) is rotatably connected to the rotating rod (302).

6. The oil drilling wellhead anti-falling object structure according to claim 5, characterized in that: The rotating rod (302) is connected to the second screw rod (303) via threads, and the second screw rod (303) is rotationally connected to the joint (305).

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